Neck ring assembly for automatic blow molding machines

Glass manufacturing – Diverse distinct glassworking apparatus – Press means with blow means


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65235, 65264, C03B 9325




A rotatable neck ring assembly for use primarily in an automatic blow molding machine includes an annular bushing and a concentrically arranged series of pivotally mounted foot members which in their closed position cooperate with the bushing to hold a parison during molding of the ware. The feet are spring-biased toward open position and cammed in to closed position when engaged by the upwardly moving parison mold. Cam surfaces on the outer surface of the feet cooperate with corresponding surfaces on a concentrically surrounding sleeve to hold the ring tightly closed on the rim of the parison even after lowering of the parison mold and throughout the blow molding portion of the cycle. The ring is opened following the molding and cooling portions of the cycle by hydraulic pressure acting on a piston which engages the upper surface of the bushing to force the feet to pivot outwardly.

patent: 4052187 (1977-10-01), Spaeth et al.


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